Pump.



N, W..THOMPSON.

PUMP.

I APPLICATION FILED MAY H, 1916- Patented Dec, 11, 1917.

. 3 SHEETS-SH .ET I

Eweviibr Jsarz 76,22 I501 a/a N. w. THOMPSON.

PUMP.

APPLICATION FILED MAY H. l9l6.

L25Q5 Patented Dec. 11,1917.

3 SHEETSSHEET 2.

l/ffforlre e s N. w. THOMPSON.

PUMP.

APPLICATION FILED MAY I1. [916.

Patented Dec. 11,1917.

3 SHEETSSHEET 3 oil.

UNITED STATES PATENT OFFICE.

NELSON W.. THOMPSON, 0F OAKLAND, CALIFORNIA, ASSIGNOR 'IO SIMPLEX REFINING COMPANY, OF SAN FRANCISCO, CALIFORNIA, A GQBPORATION OF CALIFORNIA.

PUMP...

Application filed may 11, 1910. Serial Nb. 96,950.

To all whom it may boncem:

Be it known that I, NELSON W. THOMP soN, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented a new and useful Pump, of which the following is a specification.

My invention relates to pumps, and the principal object of my invention is to provide a pump which may be used to pump hot In the process of refining petroleum oils, it is found that if the oil is forced through suitable apparatus at temperatures of 600 F. or more, and at high pressures, that certain important changes can be. made in the character of the oil. It is, however, diflicult to maintain packing under pressure at this temperature, and ordinary piston or plunger pumps cannot be maintained in service for any length of time under these conditions. It is for this particular service that my invention is mainly intended, but it obviously can be applied to many other analogous uses.

In the drawings, which are for illustrative purposes only:

Figure 1 is a plan view of a pump embodying my invention. I

Fig. 2 is a side elevation of same. i

Fig. 3 is a central section through one of the pump cylinders.

' Fig. 4 is a section on a broken through the pump cylinders.

Fig. 5 is a section through one of the valve chambers.

Fig. 6 is 'a partial section. on a plane represented by the lines a m of Fig. 7.

Fig.7 is a section on a planerepresented by the line a2"a: of Fig. 5, the ball retain-- ers and balls being removed from the right hand chamber to better illustrate the inven tion.

In these drawings, a duplex double acting steam pump is shown. This pump consists of steam cylinders 11 provided with suitable valves and valve gears 12. Piston rods 13 are reciprocated by the steam in the cylinders 11, the parts 11, 12 and 13 beingold in the art and requiring no special description. A'motordriven mechanism may be substituted therefor if desired, the only es sential feature being that the piston rods.13 are reciprocated by suitable power driven plane a means.

a suitable packing and connects to a piston 14 sliding in a pump cylinder 15. These pump cylinders are right and left handed Wlth relation to each other, each consisting of a main casting 20, a stuffing box head 21, and water .head .22. Each of the water heads is connected by flanges 23 with one of two pipes 24. Side .outlet openings 25 v I are connected through elbows 26 with pipes 27. The opening 25 and the opening through the water head 22 are located with their upper. ends flush with the top of the cyl-' inder.

Each of the pipes 25 and. 27 is connected to a cooling means 30. In the drawing, this is a long pipe provided withexternal flanges for air cooling. Water cooling may be provided if desired.

Each of the cooling means 30 is connected to a pump passage 31 in'a valve body 32, each of the valve bodies being carried on a frame 33 resting on a base 34. Located above the pump passage in each valve body 32 is a pressure chamber 35, and located below the pump passage 31 is a suction chamber-36. A cover 37 closes the top of each pressure chamber 35, and a cover 38 closes an opening 39 in the upper wallof the passage 31- just over each of the suction chambers 36.

Openings 4O connect. each pressurev chamber 35 with its corresponding passage 31, the passages 31 each being connected through openings 41. with a corresponding suction chamber 36. Suitably secured in each of the openings 40 and 41 is a valve seat 42 on which a ball valve 43 is normally Y seated, the balls having a limited movement are provided on each side of each pressure chamber and are. so arran ed that the valve bodies 32 may be clampeg together, so that all the pressure chambers are in open communication with each other, the chambers forming a pressuremanifold. A cover 47 closes one end of this manifold and a pressure pipe 48 connects to the other end.

Openings 49, providedwithflanges 50, are

provided on each side of each suction chamber, these flanges also being so placed as to be readily connected so that all the suction chambers .36 are connected together to form a suction manifold, one end of which is closed by a cover 51 and the other end of 51 and the pipe 52 may be readily interchanged if desired.

The valve bodies 32 are somewhat higher than the cylinders 15, and the pipes 24 and 27 and the cooling means 30 are so inclined that their highest point i where they con ejected. The oil in the cooling meanslt is nect to the passages 31.

I attach a peculiar importance to this feature of my invention, as it prevents air or gas pockets being formed which would tend 'to cut down the capacity and efliciency of the pump.

The method of operation is as follows:

The entire interior of the pump is filled with oil, which can conveniently be accomplished by feeding oil under slight pressure through the suction pipe 52. Steam is then turned into the cylinders 11, being controlled by the valve gear 12. The piston rods 13 then reciprocate the pistons 14 so. that the contents of each end of the cylinder are alternately increased or diminished. This forces oil in or out of the pipes 24: or 27 and in and out of the cooling means 30 and the passage 31. On the suction stroke for either end of either of the cylinders 15, a slight vacuum may be caused in the passage 31, or the pressure therein may be so relieved that hot oil from the suction manifold flows through the openings 41 intothe passage 31, the balls 13 lifting from their seats to allow this. On the pressure stroke, hot oil from the passage 31 flows through the openings into the pressure manifold, the balls 43 lifting from the seats 12 to allow this. The halls a3 prevent any return of hot oil through either the openings 40 or 4:1.

40 The internal capacity of the cooling means aasonao 30 is made large with relation to the capacity of the cylinders 15'. On each suction stroke a volume of hot oil equal to the cylinder capacity ,is drawn into the cooling means 30. This oil mixes in a measure with the oil already in the cooling means 30, tending to heat same, and on the pressure stroke an equal volume of the mixture is hottest nearest the passage 31 and is cool enough in the cylinders to allow the piston to work under ordinary temperature conditions.

I claim as my invention 1. In a pump,'a cylinder, a valve body having a pump passage therein, walls forming a pressure manifold above said passage, a pressure valve between said passage and said manifold, walls forming a suction manifold below said passage, a suction valve between said manifold and said passage, and cooling means connecting the interior of said cylinder with said pump passage.

2. In a pump, a cylinder, a valve body having a pump passage therein, walls forming a pressure manifold above said passage, a pressure valve between said passage and said manifold, walls forming a suction manifold below said passage, a suction valve between, said manifold and said passage, and

cooling means connecting the interior of said cylinder with said pump passage, said parts being so arrangedthat said pressure valve is at the highest point in said cylinder, said valve body, or said cooling m n s In testimony whereof, I have hereunto set myhand at San'Franmsco, California, this 4th day of May, 1916.

NELSON W. THOMPSON. 

